Tech Tip from CJ Pony Service: The TSW5 has 12 wires and the factory plug only has 10 pin locations. The reason for this is the switch can be used on other 1968 Fords such as T-birds and Cougars with the extra 2 pins being used for sequential lights. The rest of the colors match up to the Mustang, the 2 oddball wires simply can be taped up and are not used.